如何获得C＃中另一个网站页面的JavaScript函数的结果？

Question

我有一个使用其他网站数据的应用程序，所以我如何获取它，因为它使用了一些JavaScript函数来获取该数据，并且不会显示在页面视图源中。

Answer 1

Basically you have to render the webpage and ensure the javascript functions are run (evaluated). You could do this by "borrowing" their javascript files (by linking to them from your own page), but this may not work as you don't know what's in those files - they could be accessing DOM elements that you don't have in your page, or calling to other domains which may prevent them from working correctly.

The easiest way to show the same data is to just host the page inside an iframe on your own page. If you are looking to do this from a normal client application (ie not a web app) then you will need a browser control that you navigate to the target page. If the browser control is invisible you could then scrape values from it and show them in your app, although this is a very clumsy way to do it, and it's debatable about how ethical it is.

Answer 2

如果要另一个网站视图源，请使用HTTPWebRequest获取c＃中的响应流。

Answer 3

检查firebug，XHR中的NET选项卡，并检查所请求的资源，然后请求相同的资源。